This 12V 1A tabletop design AC adapter is an original Voodoo Lab replacement for a Pedal Power X4. It can also serve to upgrade an X4 Expander Kit to a full version stand-alone power supply.
Voodoo Lab PS1210 Power Adapter for Pedal Power X Features
12V 1A replacement adapter for Voodoo Lab Pedal Power X4
Tabletop design with detachable AC cable